Sony CDXGT210 <-- That was a mistake, the extra cash you just dropped on getting a JL sub and a Hifonics amp, was just lost. Doing what you just did is like buying a 07 Cobra and pulling the 4.6 and dropping in a 1.8 VTEC or something. Your HU has dramatic effect on your overall system quality relizablity and most importantly control. If you want a good complete wiring kit for as little cash as possible check out a Total TAK4, plenty for what your running.

P.S. take back the Sony and pick up something nicer for under $200. Check out Eclipse CD2000 or some of Clarion's entry level stuff, not too familiar with Clarion so do some searching.

 

Can't find it. What gauge is that?

 

4 gauge. Link Here. You can check out their connections area and find the TAK4 and you can also lookup a local dealer. Im pretty sure you could check internet or ebay for Total stuff too.